ASN Wikibase Occurrence # 133575
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| Date: | Tuesday 30 September 1997 |
| Time: | 11:45 LT |
| Type: |  Hughes 369HS |
| Owner/operator: | E. Marlowe Goble, Md Pc |
| Registration: | N9102F |
| MSN: | 710389S |
| Year of manufacture: | 1971 |
| Total airframe hrs: | 1163 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Morgan, UT -
 United States of America
|
| Phase: | Taxi |
| Nature: | Private |
| Departure airport: | Logan, UT (KLGU) |
| Salt Lake City, UT (KSLC) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
As the helicopter approached a mountainous landing zone at the 8,600 foot level, the pilot applied full collective control input and the helicopter entered an uncontrolled spin and descent before impacting terrain. There was no evidence of preimpact failure of the airframe, drive train, or flight controls. The pilot said he was unable to stop the right turning despite application of full left antitorque pedal. He later told a ground witness the helicopter had 'lost tail rotor' (effectiveness).
Probable Cause: The pilot's failure to maintain directional control because he exceeded the helicopter's hover performance. A factor was the high density altitude.
Accident investigation:
 |
|
Sources:
NTSB FTW97LA369
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2024 12:34 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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